摘要
利用胺滴定法在Ｈ０为＋５．０～－８．２范围的环已烷溶液中观察吸附的Ｈａｍｍｅｔ指示剂的颜色变化，选用ＰＫａ值不同的几种指示剂，测出不同酸强度下的固体催化剂酸量，作出酸强度分布曲线。
The colour change of the Hammett indicator adsorbed in the cyclohexane solutions with H 0 values in the range of +5.0 to -8.2 was examined by means of the amine titration method. By using Hammett indicators with different PK a values, the distribution curves of the acid strength as the function of acid quantity on the solid catalyst were determined, and the behaviour of the indicator is discussed.
关键词
催化剂
指示剂
固体催化剂
活性
酸性
solids
catalysts
indicators
acid strength
distribution curve
